﻿BOUNDARIES. 
  39 
  

  

  blank 
  boundary. 
  The 
  section 
  of 
  the 
  Aujan 
  is 
  also 
  interesting 
  for 
  the 
  

   appearance 
  of 
  the 
  Talchirs 
  so 
  far 
  within 
  the 
  boundary, 
  about 
  one 
  mile 
  

   from 
  the 
  point 
  of 
  the 
  metamorphic 
  ridge. 
  At 
  first 
  sight, 
  there 
  would 
  

   seem 
  to 
  be 
  an 
  extremely 
  unconformable 
  junction 
  of 
  strong 
  conglomerates 
  

   upon 
  crushed 
  Talchir 
  boulder-clay 
  ; 
  but 
  in 
  the 
  Patpani 
  branch 
  of 
  the 
  river 
  

   there 
  is 
  a 
  section 
  showing, 
  on 
  the 
  south 
  of 
  the 
  inlier, 
  some 
  thinner 
  

   earthy 
  beds 
  of 
  the 
  Bagra 
  group 
  ; 
  and 
  these 
  fully 
  partake 
  in 
  the 
  local 
  

   contortion. 
  It 
  is 
  a 
  good 
  instance 
  of 
  the 
  very 
  deceptive 
  appearance 
  

   produced 
  by 
  disturbance 
  upon 
  contiguous 
  conformable 
  strata 
  of 
  very 
  

   different 
  resisting 
  power. 
  There 
  is 
  nothing 
  to 
  suggest 
  that 
  there 
  is 
  

   much 
  elevation 
  connected 
  with 
  the 
  appearance 
  of 
  the 
  Talchirs 
  at 
  this 
  

   local 
  anticlinal. 
  The 
  absence 
  of 
  the 
  Barakars 
  over 
  them 
  rather 
  suggests 
  

   that 
  there 
  was 
  here 
  an 
  originally 
  elevated 
  extension 
  of 
  the 
  bottom 
  group. 
  

  

  Three 
  miles 
  to 
  the 
  west 
  of 
  the 
  Anjan, 
  the 
  Devi 
  ridge 
  of 
  meta- 
  

  

  Section 
  in 
  the 
  Amadi 
  mOT 
  P 
  hics 
  forms 
  tbe 
  boundary 
  for 
  six 
  miles, 
  running 
  

   stream 
  - 
  west- 
  35°- 
  south, 
  somewhat 
  oblique 
  to 
  the 
  general 
  

  

  strike. 
  Along 
  the 
  inner 
  (south-east) 
  base 
  the 
  Talchirs 
  are 
  largely 
  

   exposed 
  ; 
  and 
  in 
  the 
  Amadi 
  stream 
  there 
  is 
  an 
  excellent 
  section, 
  showing 
  

   on 
  the 
  south 
  a 
  slightly 
  disturbed 
  junction 
  with 
  the 
  Bagra 
  beds, 
  and, 
  

   close 
  by, 
  the 
  effects 
  of 
  concentrated 
  compression 
  near 
  the 
  boundary 
  (see 
  

   fig. 
  3). 
  The 
  first 
  contact 
  is 
  about 
  600 
  yards 
  from 
  the 
  ridge; 
  bright 
  

   mottled 
  coarse 
  conglomeritic 
  sandstones 
  rest 
  upon 
  a 
  slightly 
  denuded 
  

   edge 
  of 
  Talchir 
  boulder-clay, 
  the 
  dip 
  in 
  both 
  rocks 
  being 
  about 
  15° 
  to 
  

   the 
  south. 
  At 
  fifty 
  yards 
  down 
  stream 
  a 
  strong 
  dyke 
  or 
  thick 
  sheet 
  

   of 
  trap 
  rises 
  at 
  a 
  very 
  low 
  angle 
  from 
  the 
  south, 
  scarcely 
  tilting 
  

   the 
  Talchir 
  beds 
  at 
  the 
  contact. 
  The 
  outcrop 
  of 
  the 
  trap 
  is 
  about 
  twenty 
  

   yards 
  wide, 
  the 
  northern 
  edge 
  seeming 
  to 
  rise 
  steeply 
  ; 
  and 
  at 
  a 
  few 
  feet 
  

   from 
  it, 
  sandstone 
  conglomerates 
  have 
  a 
  dip 
  of 
  65° 
  towards 
  the 
  trap. 
  

   There 
  are 
  only 
  about 
  60 
  feet 
  of 
  the 
  sandstone, 
  the 
  same 
  beds 
  ap- 
  

   parently 
  as 
  at 
  the 
  upper 
  junction 
  ; 
  and 
  they 
  are 
  here 
  again 
  underlaid 
  

   by 
  parallel 
  beds 
  of 
  the 
  Talchir 
  clays, 
  the 
  boulder 
  bed 
  amongst 
  them- 
  

  

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